Grass Peas (Horse Lentils) look like large angular grey green lentils. The plants are pretty with their finely divided leaves and blue flowers. Cook like a dry pea. However, eaten in large quantities the neurotoxin present can be harmful, causing Lathyrism (paralysis of lower extremities). Main purpose is as a nitrogen fixing plant for soil health.
Lathyrus sativus
Lathyrus